<!-- extends表明此页面继承自 base.html 文件 -->
{% extends "base.html" %}
{% load staticfiles %}

<!-- 写入 base.html 中定义的 title -->
{% block title %}
    文章详情
{% endblock title %}

<!-- 写入 base.html 中定义的 content -->
{% block content %}
    <script src="{% static 'ckeditor/ckeditor/plugins/prism/lib/prism/prism_patched.min.js' %}"></script>
    <link rel="stylesheet" href="{% static 'prism/prism.css' %}">

    <!-- 文章详情 -->
    <div class="container">
        <div class="row">
            <div class="col-9">
                <!-- 标题及作者 -->
                <h1 class="mt-4 mb-4">{{ article.title }}</h1>
                <div class="alert alert-success">
                    <div>
                        作者：{{ article.author }}
                        {% if user == article.author %}

                            <!-- · <a href="#" onclick="confirm_delete()">删除文章</a> -->
                            · <a href="#" onclick="confirm_safe_delete()">删除文章</a>
                            <form
                                    style="display:none;"
                                    id="safe_delete"
                                    action="{% url 'article:article_safe_delete' article.id %}"
                                    method="POST"
                            >
                                {% csrf_token %}
                                <button type="submit">发送</button>
                            </form>

                            · <a href="{% url "article:article_update" article.id %}">
                            编辑文章
                        </a>
                        {% endif %}
                    </div>
                    <div>
                        浏览：{{ article.total_views }}
                    </div>
                </div>
                <!-- 文章正文 -->
                <div class="col-12">
                    <p>{{ article.body|safe }}</p>
                </div>

                <!-- 点赞 -->
                <div style="text-align:center;" class="mt-4">
                    <button class="btn btn-outline-danger"
                            type="button"
                            onclick="validate_is_like(
                                    '{% url 'article:increase_likes' article.id %}',
                                    {{ article.id }},
                                    {{ article.likes }}
                                    )"
                    >
                        <span>点赞</span>
                        <span>
                        <i class="fas fa-heart"></i>
                    </span>
                        <span id="likes_number">
                        {{ article.likes }}
                    </span>
                    </button>
                </div>

                <!-- 相邻文章导航 -->
                <br>
                <div class="row justify-content-end">
                    {% if next_article %}
                        <div class="col-auto mr-auto">
                            <a href="{{ next_article.get_absolute_url }}"
                               class="btn btn-info"
                            >
                                {{ next_article.title }}
                            </a>
                        </div>
                    {% endif %}
                    {% if pre_article %}
                        <div class="col-auto">
                            <a href="{{ pre_article.get_absolute_url }}"
                               class="btn btn-info"
                            >
                                {{ pre_article.title }}
                            </a>
                        </div>
                    {% endif %}
                </div>


                <!-- 发表评论 -->
                <hr>
                {% if user.is_authenticated %}
                    <div>
                        <form
                                action="{% url 'comment:post_comment' article.id %}"
                                method="POST"
                        >
                            {% csrf_token %}
                            <div class="form-group">
                                <label for="body">
                                    <strong>
                                        我也要发言：
                                    </strong>
                                </label>
                                <div>
                                    {{ comment_form.media }}
                                    {{ comment_form.body }}
                                </div>
                            </div>
                            <!-- 提交按钮 -->
                            <button type="submit" class="btn btn-primary ">发送</button>
                        </form>
                    </div>
                    <br>
                {% else %}
                    <br>
                    <h5 class="row justify-content-center">
                        请<a href="{% url 'userprofile:login' %}">登录</a>后回复
                    </h5>
                    <br>
                {% endif %}



                <!-- 显示评论 -->
                {% load mptt_tags %}
                <h4>共有{{ comments.count }}条评论</h4>
                <div class="row">
                    <!-- 遍历树形结构 -->
                    {% recursetree comments %}
                        {% with comment=node %}
                            <div class="{% if comment.reply_to %}
                                    offset-1 col-11
                                    {% else %}
                                    col-12
                                    {% endif %}"
                                 id="comment_elem_{{ comment.id }}"
                            >
                                <hr>
                                <p>
                                    <strong style="color: pink">
                                        {{ comment.user }}
                                    </strong>

                                    <!-- 显示被回复人 -->
                                    {% if comment.reply_to %}
                                        <i class="far fa-arrow-alt-circle-right"
                                           style="color: cornflowerblue;"
                                        ></i>
                                        <strong style="color: pink">
                                            {{ comment.reply_to }}
                                        </strong>
                                    {% endif %}

                                </p>
                                <div>{{ comment.body|safe }}</div>

                                <div>
                                <span style="color: gray">
                                    {{ comment.created|date:"Y-m-d H:i" }}
                                </span>

                                    <!-- 加载 modal 的按钮 -->
                                    {% if user.is_authenticated %}
                                        <button type="button"
                                                class="btn btn-light btn-sm text-muted"
                                                onclick="load_modal({{ article.id }}, {{ comment.id }})"
                                        >
                                            回复
                                        </button>
                                    {% else %}
                                        <a class="btn btn-light btn-sm text-muted"
                                           href="{% url 'userprofile:login' %}"
                                        >
                                            回复
                                        </a>
                                    {% endif %}
                                </div>

                                <!-- Modal -->
                                <div class="modal fade"
                                     id="comment_{{ comment.id }}"
                                     tabindex="-1"
                                     role="dialog"
                                     aria-labelledby="CommentModalCenter"
                                     aria-hidden="true"
                                >
                                    <div class="modal-dialog modal-dialog-centered modal-lg" role="document">
                                        <div class="modal-content" style="height: 480px">
                                            <div class="modal-header">
                                                <h5 class="modal-title" id="exampleModalCenterTitle">
                                                    回复 {{ comment.user }}：</h5>
                                            </div>
                                            <div class="modal-body" id="modal_body_{{ comment.id }}"></div>
                                        </div>
                                    </div>
                                </div>

                                {% if not comment.is_leaf_node %}
                                    <div class="children">
                                        {{ children }}
                                    </div>
                                {% endif %}
                            </div>

                        {% endwith %}
                    {% endrecursetree %}
                </div>
            </div>

            <!-- 目录 -->
            <div class="col-3 mt-4" id="sidebar" class="sidebar">
                <div class="sidebar__inner">
                    <h4><strong>目录</strong></h4>
                    <hr>
                    <div>
                        {{ toc|safe }}
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- 粘性侧边栏样式 -->
    <style>
        .sidebar {
            will-change: min-height;
        }

        .sidebar__inner {
            transform: translate(0, 0); /* For browsers don't support translate3d. */
            transform: translate3d(0, 0, 0);
            will-change: position, transform;
        }
    </style>

    <script>
        // 删除文章的函数
        function confirm_delete() {
            // 调用layer弹窗组件
            layer.open({
                // 弹窗标题
                title: "确认删除",
                // 正文
                content: "确认删除这篇文章吗？",
                // 点击确定按钮后调用的回调函数
                yes: function (index, layero) {
                    // 指定应当前往的 url
                    location.href = '{% url "article:article_delete" article.id %}'
                },
            })
        }

        function confirm_safe_delete() {
            layer.open({
                title: "确认删除",
                content: "确认删除这篇文章吗？",
                yes: function (index, layero) {
                    $('form#safe_delete button').click();
                    layer.close(index);
                }
            })
        }
    </script>
{% endblock content %}

{% block script %}

    <!-- csrf token -->
    <script src="{% static 'csrf.js' %}"></script>
    <script>
        // 点赞功能主函数
        function validate_is_like(url, id, likes) {
            // 取出 LocalStorage 中的数据
            let storage = window.localStorage;
            const storage_str_data = storage.getItem("my_blog_data");
            let storage_json_data = JSON.parse(storage_str_data);
            // 若数据不存在，则创建空字典
            if (!storage_json_data) {
                storage_json_data = {}
            }
            ;
            // 检查当前文章是否已点赞。是则 status = true
            const status = check_status(storage_json_data, id);
            if (status) {
                layer.msg('已经点过赞了哟~');
                // 点过赞则立即退出函数
                return;
            } else {
                // 用 Jquery 找到点赞数量，并 +1
                $('span#likes_number').text(likes + 1).css('color', '#dc3545');
            }
            // 用 ajax 向后端发送 post 请求
            $.post(
                url,
                // post 只是为了做 csrf 校验，因此数据为空
                {},
                function (result) {
                    if (result === 'success') {
                        // 尝试修改点赞数据
                        try {
                            storage_json_data[id] = true;
                        } catch (e) {
                            window.localStorage.clear();
                        }
                        ;

                        const d = JSON.stringify(storage_json_data);
                        // 尝试存储点赞数据到 LocalStorage
                        try {
                            storage.setItem("my_blog_data", d);
                        } catch (e) {
                            // code 22 错误表示 LocalStorage 空间满了
                            if (e.code === 22) {
                                window.localStorage.clear();
                                storage.setItem("my_blog_data", d);
                            }
                        }
                        ;
                    } else {
                        layer.msg("与服务器通信失败..过一会儿再试试呗~");
                    }

                }
            );
        };

        // 辅助点赞主函数，验证点赞状态
        function check_status(data, id) {
            // 尝试查询点赞状态
            try {
                if (id in data && data[id]) {
                    return true;
                } else {
                    return false;
                }
            } catch (e) {
                window.localStorage.clear();
                return false;
            }
            ;
        };
    </script>

    <!-- 粘性侧边栏 -->
    <script src="{% static 'sticky_sidebar/jquery.sticky-sidebar.min.js' %}"></script>
    <script type="text/javascript">
        $('#sidebar').stickySidebar({
            topSpacing: 20,
            bottomSpacing: 20,
        });
    </script>

    <!-- Ckeditor自适应 -->
    <script>
        $(".django-ckeditor-widget").removeAttr('style');
    </script>

    <!-- 唤醒二级回复的 modal -->
    <script>
        // 加载 modal
        function load_modal(article_id, comment_id) {
            let modal_body = '#modal_body_' + comment_id;
            let modal_id = '#comment_' + comment_id;

            // 加载编辑器
            if ($(modal_body).children().length === 0) {
                let content = '<iframe src="/comment/post-comment/' +
                    article_id +
                    '/' +
                    comment_id +
                    '" frameborder="0" style="width: 100%; height: 100%;"></iframe>';
                $(modal_body).append(content);
            }
            ;

            $(modal_id).modal('show');
        };

        // 处理二级回复
        function post_reply_and_show_it(new_comment_id) {
            let next_url = "{% url 'article:article_detail' article.id %}";
            // 去除 url 尾部 '/' 符号
            next_url = next_url.charAt(next_url.length - 1) == '/' ? next_url.slice(0, -1) : next_url;
            // 刷新并定位到锚点
            window.location.replace(next_url + "#comment_elem_" + new_comment_id);
        };
    </script>
{% endblock script %}